HHH-11764 - JTS geometry being bound to byte array instead of PGgeometry

databases.gradle

@@ -52,7 +52,7 @@ ext {
                         'jdbc.url'   : 'jdbc:mariadb://127.0.0.1/hibernate_orm_test'
                 ],
                 postgis : [
-                        'db.dialect' : 'org.hibernate.spatial.dialect.postgis.PostgisDialect',
+                        'db.dialect' : 'org.hibernate.spatial.dialect.postgis.PostgisPG95Dialect',
                         'jdbc.driver': 'org.postgresql.Driver',
                         'jdbc.user'  : 'hibernate_orm_test',
                         'jdbc.pass'  : 'hibernate_orm_test',

documentation/src/test/java/org/hibernate/userguide/spatial/SpatialTest.java

@@ -11,6 +11,7 @@ import javax.persistence.Id;
 
 import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
 import org.hibernate.spatial.dialect.postgis.PostgisDialect;
+import org.hibernate.spatial.dialect.postgis.PostgisPG95Dialect;
 
 import org.hibernate.testing.RequiresDialect;
 import org.junit.Test;
@@ -30,10 +31,10 @@ import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
 /**
  * @author Vlad Mihalcea
  */
-@RequiresDialect(PostgisDialect.class)
+@RequiresDialect(PostgisPG95Dialect.class)
 public class SpatialTest extends BaseEntityManagerFunctionalTestCase {
 
-    GeometryFactory geometryFactory = new GeometryFactory();
+    private GeometryFactory geometryFactory = new GeometryFactory();
 
     @Override
     protected Class<?>[] getAnnotatedClasses() {

hibernate-spatial/src/main/java/org/hibernate/spatial/dialect/postgis/PostgisFunctions.java

@@ -139,9 +139,7 @@ class PostgisFunctions extends SpatialFunctionsRegistry {
 				)
 		);
 		put(
-				"buffer", new StandardSQLFunction(
-						"st_buffer"
-				)
+				"buffer", new BufferFunction()
 		);
 		put(
 				"convexhull", new StandardSQLFunction(
@@ -201,4 +199,29 @@ class PostgisFunctions extends SpatialFunctionsRegistry {
 			return rendered + "::geometry";
 		}
 	}
+
+	private static class BufferFunction extends  StandardSQLFunction {
+
+		public BufferFunction() {
+			super( "st_buffer" );
+		}
+
+		@Override
+		public String render(
+				Type firstArgumentType, List arguments, SessionFactoryImplementor sessionFactory) {
+			final StringBuilder buf = new StringBuilder();
+			buf.append( getName() ).append( '(' );
+			for ( int i = 0; i < arguments.size(); i++ ) {
+				buf.append( arguments.get( i ) );
+				if( i == 0 ) {
+					buf.append( "::geometry" );
+				}
+				if ( i < arguments.size() - 1 ) {
+					buf.append( ", " );
+				}
+			}
+			return buf.append( ")::geometry" ).toString();
+		}
+	}
+
 }

hibernate-spatial/src/test/java/org/hibernate/spatial/testing/dialects/postgis/PostgisBufferTest.java

@@ -0,0 +1,115 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.spatial.testing.dialects.postgis;
+
+import java.util.List;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+import org.hibernate.spatial.dialect.postgis.PostgisPG95Dialect;
+
+import org.hibernate.testing.RequiresDialect;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Test;
+
+import com.vividsolutions.jts.geom.Coordinate;
+import com.vividsolutions.jts.geom.Geometry;
+import com.vividsolutions.jts.geom.GeometryFactory;
+import com.vividsolutions.jts.geom.Point;
+import com.vividsolutions.jts.geom.Polygon;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInHibernate;
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author Vlad Mihalcea
+ */
+@RequiresDialect(PostgisPG95Dialect.class)
+public class PostgisBufferTest extends BaseCoreFunctionalTestCase {
+
+    private GeometryFactory geometryFactory = new GeometryFactory();
+
+    @Override
+    protected Class<?>[] getAnnotatedClasses() {
+        return new Class<?>[] {
+            Event.class,
+        };
+    }
+
+    @Test
+    public void test() {
+        Long addressId = doInHibernate( this::sessionFactory, session -> {
+            Event event = new Event();
+            event.setId( 1L);
+            event.setName( "Hibernate ORM presentation");
+            Point point = geometryFactory.createPoint( new Coordinate( 10, 5 ) );
+            event.setLocation( point );
+
+            session.persist( event );
+            return event.getId();
+        });
+
+        doInHibernate( this::sessionFactory, session -> {
+            Coordinate [] coordinates = new Coordinate[] {
+                    new Coordinate(1,1), new Coordinate(20,1), new Coordinate(20,20),
+                    new Coordinate(1,20), new Coordinate(1,1)
+            };
+            Polygon window = geometryFactory.createPolygon( coordinates );
+
+            List<Event> events = session.createQuery(
+                "select e " +
+                "from Event e " +
+                "where buffer(:window, 100) is not null", Event.class)
+            .setParameter("window", window)
+            .getResultList();
+
+            assertEquals(1, events.size());
+
+            List<Geometry> locations = session.createQuery(
+                "select buffer(e.location, 10) " +
+                "from Event e ", Geometry.class)
+            .getResultList();
+
+            assertEquals(1, locations.size());
+        });
+    }
+
+@Entity(name = "Event")
+public static class Event {
+
+    @Id
+    private Long id;
+
+    private String name;
+
+    private Point location;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Point getLocation() {
+        return location;
+    }
+
+    public void setLocation(Point location) {
+        this.location = location;
+    }
+}
+}